- A
Add a new non-overlapping address space to VNet-B.
This gives VNet-B a range that does not conflict with VNet-A, which is required for peering.
- B
Migrate the workloads and subnets in VNet-B to the new address space before removing the overlapping range.
This preserves application connectivity while the overlapping CIDR is phased out and the peering can be created.
- C
Enable gateway transit on both VNets to bypass the overlap check.
Why wrong: Gateway transit changes routing behavior, but it does not remove the address-space overlap restriction for peering.
- D
Create a private endpoint in VNet-A so the peering can use private connectivity.
Why wrong: Private endpoints are for PaaS service access, not for resolving overlapping CIDR blocks between VNets.
- E
Associate a route table with VNet-B to force Azure to accept the peering.
Why wrong: Route tables influence packet forwarding, but they do not change VNet peering validation requirements.
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A VNet peering attempt between VNet-A and VNet-B fails because both VNets include 10.40.0.0/16. VNet-B hosts active workloads, so the team wants to readdress it without downtime. Which two actions should the administrator take? Select two.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Add a new non-overlapping address space to VNet-B.
Option A is correct because adding a new non-overlapping address space to VNet-B resolves the IP address overlap that prevents VNet peering. Azure VNet peering requires that the address spaces of both VNets do not overlap; overlapping ranges cause the peering to fail. By adding a new range (e.g., 10.41.0.0/16) to VNet-B, the administrator introduces a non-conflicting address space that can be used for peering while the existing overlapping range remains active for workloads.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add a new non-overlapping address space to VNet-B.
Why this is correct
This gives VNet-B a range that does not conflict with VNet-A, which is required for peering.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Migrate the workloads and subnets in VNet-B to the new address space before removing the overlapping range.
Why this is correct
This preserves application connectivity while the overlapping CIDR is phased out and the peering can be created.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable gateway transit on both VNets to bypass the overlap check.
Why it's wrong here
Gateway transit changes routing behavior, but it does not remove the address-space overlap restriction for peering.
- ✗
Create a private endpoint in VNet-A so the peering can use private connectivity.
Why it's wrong here
Private endpoints are for PaaS service access, not for resolving overlapping CIDR blocks between VNets.
When this WOULD be correct
A question where VNet-A needs to securely connect to an Azure SQL Database in VNet-B without exposing it to the public internet, and the VNets are already peered or can be peered without overlap. In that case, creating a private endpoint in VNet-A would be correct.
- ✗
Associate a route table with VNet-B to force Azure to accept the peering.
Why it's wrong here
Route tables influence packet forwarding, but they do not change VNet peering validation requirements.
When this WOULD be correct
A route table would be correct when you need to control traffic flow between subnets or to force-tunnel traffic through a network virtual appliance, such as in a hub-spoke topology where spoke VNets have non-overlapping address spaces.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Add a new non-overlapping address space to VNet-B.Correct answer▾
Why this is correct
This gives VNet-B a range that does not conflict with VNet-A, which is required for peering.
✗Enable gateway transit on both VNets to bypass the overlap check.Wrong answer — click to see why▾
Why this is wrong here
Gateway transit enables cross-premises connectivity via a VPN gateway, but does not bypass Azure's VNet peering address space overlap validation. Overlapping address spaces are a fundamental constraint that cannot be overridden by gateway transit.
★ When this WOULD be the correct answer
In a scenario where VNet-A and VNet-B are in different regions and you need to allow VNet-B to use VNet-A's VPN gateway to connect to an on-premises network, enabling gateway transit on VNet-A and configuring use remote gateways on VNet-B would be correct.
Why candidates choose this
Candidates may mistakenly think gateway transit can resolve any connectivity issue between VNets, or confuse it with a feature that bypasses address validation, when it actually only facilitates routing through a gateway.
✗Create a private endpoint in VNet-A so the peering can use private connectivity.Wrong answer — click to see why▾
Why this is wrong here
Private endpoints enable secure access to Azure PaaS services over a private IP, but they do not resolve overlapping address spaces in VNet peering. The peering overlap check is a fundamental requirement that cannot be bypassed by private endpoints.
★ When this WOULD be the correct answer
A question where VNet-A needs to securely connect to an Azure SQL Database in VNet-B without exposing it to the public internet, and the VNets are already peered or can be peered without overlap. In that case, creating a private endpoint in VNet-A would be correct.
Why candidates choose this
Candidates may confuse private endpoints as a general connectivity solution for VNet peering issues, not realizing that private endpoints address private access to services, not network address conflicts.
✗Associate a route table with VNet-B to force Azure to accept the peering.Wrong answer — click to see why▾
Why this is wrong here
Associating a route table with VNet-B does not bypass Azure's address space overlap check for VNet peering; the peering will still fail because overlapping address spaces are not allowed regardless of routing.
★ When this WOULD be the correct answer
A route table would be correct when you need to control traffic flow between subnets or to force-tunnel traffic through a network virtual appliance, such as in a hub-spoke topology where spoke VNets have non-overlapping address spaces.
Why candidates choose this
Candidates may think that custom routes can override Azure's peering constraints, confusing routing configuration with the fundamental requirement for non-overlapping address spaces in peering.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think gateway transit or route tables can override the address space overlap requirement, but Azure strictly enforces non-overlapping address spaces for VNet peering, and only address space modification resolves the conflict.
Detailed technical explanation
How to think about this question
Azure VNet peering uses the Azure backbone to connect VNets, and the address space validation is performed at the Azure Resource Manager layer. When overlapping ranges exist, Azure cannot route traffic correctly because it cannot distinguish which VNet owns a given IP address. The recommended approach is to add a new address space, migrate subnets and workloads to it (using techniques like adding new subnets, moving resources, or using Azure Site Recovery), and then remove the overlapping range—all without downtime if done incrementally.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Virtual Networking — This question tests Implement and Manage Virtual Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a new non-overlapping address space to VNet-B. — Option A is correct because adding a new non-overlapping address space to VNet-B resolves the IP address overlap that prevents VNet peering. Azure VNet peering requires that the address spaces of both VNets do not overlap; overlapping ranges cause the peering to fail. By adding a new range (e.g., 10.41.0.0/16) to VNet-B, the administrator introduces a non-conflicting address space that can be used for peering while the existing overlapping range remains active for workloads.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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